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- Click on the post.
- Seeing it is messed up, you can click history just above and to the right of the title of the post:
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- Look for the date when the post was last working successfully
- Click the date part of that selection
- Verify it looks correct when you view that page
- Then hit Edit on that version of the page
- Click Save
at the bottom of the page.
If you follow the above and save it, it returns you to whatever previous version you wanted.